Datasheet

Section 15 Serial Communication Interface (SCI, IrDA)
Rev. 3.00 Mar 17, 2006 page 671 of 926
REJ09B0283-0300
Bit Bit Name Initial Value R/W Description
1
0
CKE1
CKE0
0
0
R/W
R/W
Clock Enable 1 and 0
Selects the clock source and SCK pin function.
Asynchronous mode
00: On-chip baud rate generator
SCK pin functions as I/O port
01: On-chip baud rate generator
(Outputs a clock of the same frequency as the
bit rate from the SCK pin.)
1X: External clock
(Inputs a clock with a frequency 16 times the
bit rate from the SCK pin.)
Clocked synchronous mode
0X: Internal clock (SCK pin functions as clock
output)
1X: External clock (SCK pin functions as clock
input)
X: Don’t care